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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
How to solve log questions easily when they are in decimal..Please help me ??. |
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| 2. |
The kinetic energy of ejected electron depends on |
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Answer» As we know :$$\\boxed{\\huge{K.E.= h (v - v_0)}}$$ It depends on the frequency of the photons or can say the energy of photons wjich are strike on it |
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| 3. |
Calculate the momentum of a moving particle which has a de broglie wavelength of 200pm |
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Answer» 3.313 ×10^-34 kgms^-1 {tex}Momentum=3.313×10^-24kgms-{/tex}Explanation:Here,de-broglie wavelength.wavelenght=h/mv200× 10-12=6.626×10-34/p[1pm=10-12m,h=6.626×10-34]p=6.626×10-34/200×10-12p=6.626×10-34/2×10-10p=3.313×10 -34+10p=3.313×10-24kgms- |
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| 4. |
My Facebook id - Ritesh Gupta |
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Answer» Hi Ritesh i dont use fb then m kaise baat kru With white and blue t shirt |
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| 5. |
Electronegativity denoted by ?? Symbol with name |
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| 6. |
Reference book ? for Chemistry ? |
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Answer» NCERT Okay! ? |
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| 7. |
Homogenous mixture?? |
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Answer» Kinna chhota baccha hai ???? Ok broo.. Thanks ? |
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| 8. |
Heterogeneous mixture?? |
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Answer» Ooo... Bbyee.. See ya ? ??? ? |
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| 9. |
What is mixture?? |
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Answer» Okay!! ?... Or btao? ?agar kuch hai btane ko to.. Lol ?? Physics me question hai?? Niche dekho ?? |
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| 10. |
What is solution?? |
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Answer» Yasss ?? Hnn???apko kyaa lag mene kiyaa h kyaa?? Mene nahi kiya hai ???Dekho mai bhi report hui hu? |
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| 11. |
Identify the group having metal,non metal,liquid as well as gas at the room temperature |
| Answer» Are you sure that its group 7 | |
| 12. |
Name two physical quantities which can be estimated by principal quantum number (n). |
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| 13. |
Role of chemistry ? |
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Answer» Ha bhai....bas complete hoga yek bar....revision baki hai Gm sis.....part one second week tak ho jayega.....bas hoga hi ? |
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| 14. |
Calculate energy of one mole of photons of radiation whose frequency is 5×10¹⁴Hz |
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Answer» energy = number of photons * energy in one photon = n h v = 6.023 × 10²³\xa0× 6.626 × 10⁻³⁴ × 5 × 10¹⁴ Joules = 199.54 kJoules \xa0Calcualte the energy of one mole of photons of radiation whose frequency is\xa05 x 1014Hz. A n s w e r ;Energy (E) of one photon = hvHere, h = 6.626 x 10-34\xa0Js v = 5 x 1014\xa0s-1 |
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| 15. |
Draw structure ofCNFe,ClFe,SFu |
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| 16. |
Stoichiometry and stiichiometric calculation ??????? |
| Answer» What | |
| 17. |
What is electronegativity?? |
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Answer» Electronegativity is defined as tendency of an electron to attract its shared pair electrons in a chemical bond Electronegativity, symbol χ, measures the tendency of an atom to attract a shared pair of electrons. An atom\'s electronegativity is affected by both its atomic number and the distance at which its valence electrons reside from the charged nucleus. The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity. The tendency of an atom in a molecule to attract the shared pair of electrons towards itself is known as electronegativity. |
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| 18. |
Why cannot oxidation occur without reduction |
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Answer» In a chemical reaction, the species which loses electrons is said to be oxidised and the species which gains electrons is said to be reduced. Since there is no net loss or gain of electrons in a chemical reaction, it means that a substance can gain electron only if another substance that can lose electron is also present in the system. Similarly, a substance can lose electrons only if another substance which can gain electrons is also present in the system. This means oxidation can take place only if reduction also takes place simultaneously and vice versa. In other words, oxidation-reduction reactions are electron transfer processes and always occur side by side. Such reactions in which oxidation and reduction take place simultaneously are called oxidation-reduction or simply redox reactions. For example, consider the following reaction:This reaction consists of two distinct simultaneous processes which take place\xa0in such a way that\xa0No. of electrons lost = No. of electrons gained(i) Oxidation half-reaction:Here each atom of zinc loses two electrons and thus gets oxidised to\xa0Zn2+\xa0ions.(ii) Reduction half-reaction:Thus, a redox reaction may also be defined as a reaction in which electrons are transferred from one reactant to the other. BAMS ebe |
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| 19. |
What is octahedral shape??? |
| Answer» Sulfur hexafluoride\xa0is a common example of an octahedral molecule. The central\xa0sulfur atom\xa0is bonded to six fluoride atoms. In molybdenum hexacarbonyl, a central molybdenum atom is bonded to six carbonyl groups. | |
| 20. |
Define magic number? |
| Answer» In the periodic table, elements with similar properties are repeated after intervals of 2, 8, 18, 32 etc. These numbers are called magic numbers. | |
| 21. |
1 mole of photons each of the frequency 250 as minus one would have approximately a total energy of |
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| 22. |
How many molecules of water of hydration are present in 630mg of oxalic acid??? |
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Answer» But how to solve..? 6.023×10²³.....may be |
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| 23. |
Shapes of subshell?? |
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Answer» Subshells are of basically 4 shapes- s subshell is spherical in shape, p subshell is of dumbbell shape, d subhshell has a double dumbbell appearance and the last one is f subshell, which has a complex organisation. Electrons within an atom can be assessed according to the shell, subshell, and orbital to which they are assigned. These assessments are based on the quantum mechanical model. Shells are numbered as n=1,2,3,4, etc. and increase in size and energy as they get further away from the nucleus. Shells can be subdivided into subshells. The maximum number of subshells is equivalent to the shell number. For example, when n=1 (first shell), only one subshell is possible and when n=2 (second shell), two subshells are possible. There are four different types of subshells. These various types of subshells are denoted by the letters s, p, d, and f. Each subshell has a maximum number of electrons which it can hold:\xa0s\xa0- 2 electrons,\xa0p\xa0- 6 electrons,\xa0d\xa0- 10 electrons, and\xa0f\xa0- 14 electrons. The\xa0s\xa0subshell is the lowest energy subshell and the\xa0f\xa0subshell is the highest energy subshell. As was mentioned previously, the shell number is equal to the possible number of subshells. Thus, when n=1, the only subshell possible is the\xa01s\xa0subshell. When n=2, two subshells are possible the\xa02s\xa0and\xa02p. When n=3, three subshells are possible the\xa03s,\xa03p, and\xa03d. This means that in the first shell only two electrons are possible and they would be found in the\xa01s\xa0(2 electrons) subshell. In the second shell, 8 electrons are possible and would be found in the\xa02s\xa0(2 electrons) and the\xa02p\xa0(6 electrons) subshells. Each subshell is further divided into orbitals. An orbital is defined as a region of space in which an electron can be found. Only two electrons are possible per orbital. Thus, the\xa0s\xa0subshell may contain only one orbital and the\xa0p\xa0subshell may contain three orbitals. Each orbital has its own distinct shape. An\xa0s\xa0orbital found in a\xa0s\xa0subshell is spherical,\xa0p\xa0orbitals found in\xa0p\xa0subshells are two-lobed, and\xa0d\xa0orbitals found in\xa0d\xa0subshells are four-lobed. Since\xa0d\xa0and\xa0f\xa0orbitals do not play an important role in organic chemistry, they will not be discussed further.\xa0 Since there are three possible orbitals per p subshell, each orbital adopts its own orientation. The\xa0px\xa0orbital lies along the\xa0x\xa0axis, the\xa0py\xa0orbital lies along the\xa0y\xa0axis, and the\xa0pz\xa0orbital lies along the\xa0z\xa0axis. |
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| 24. |
What is molar ratio?? |
| Answer» Molar ratios\xa0state the proportions of reactants and products that are used and formed in a chemical reaction.\xa0Molar ratios\xa0can be derived from the coefficients of a balanced chemical equation. | |
| 25. |
Volume percent?? |
| Answer» Mass by volume percentage\tMass by volume percentage can be defined as the mass of solute dissolved in 100 mL of the solution.\tFor instance, mass by volume percent of a solution with 1 g of solute dissolved in 100 mL of\xa0solution\xa0will be 1% or 1% (mass/volume).\tMathematically, Mass by volume% = | |
| 26. |
5. Arrange the following in the increasing order of size:-F^-,Li^+,Na^+,Cl^- |
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| 27. |
Equivalent mass of acid?? |
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Answer» Me too How are you Heyy aadya |
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| 28. |
Equivalent mass of base?? |
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Answer» questions hi questions dikh rhe hai cbse pe aadya name se????????? Kya abb tumhe kya hogya???? |
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| 29. |
Equivalent mass of salt?? |
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| 30. |
Calculate the molarity of water if its density is 1000kg/m3 ? |
| Answer» Molarity = Number of moles of solute per litre of solution in molar concentration\xa0M = no of moles / volume\xa0Mole = mass/molar mass = 1000/18= 55.56 mol\xa01l of water = 1000mL = 1Kg\xa0Density = 1000kg/m3\xa0therefore Molarity = 55.56mol/1L = 55.56mol/L | |
| 31. |
What is the molality of a solution which contains 36g of glucose in 250g of water? |
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Answer» Sahi h Royal Thakur ... Given,Mass of solute, glucose = 36 gMass of solvent, water = 250 gMolar mass of glucose = 180 g/moleMolality\xa0: It is defined as the number of moles of solute present in the one kilogram of solvent.Formula used :where,\xa0= mass of solute, glucose\xa0= mass of solvent, water\xa0= molar mass of solute, glucoseNow put all the given values in the above formula, we getTherefore, the molality of solution is, 0.8 mole/Kg |
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| 32. |
Active mass of 0.64 grams SO2 in 10lit vessel is |
| Answer» Active\xa0Mass\xa0=\xa0Molecular\xa0Mass×VolumeGiven\xa0Weight\u200bActive\xa0Mass\xa0=\xa064×100.64\u200b\xa0=\xa010−3M | |
| 33. |
What is chemistry ?? |
| Answer» Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances. | |
| 34. |
Chemical bonding and molecular structure exercise solutions |
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| 35. |
Which of the following terms are unitless 1 molaity 2 Molarity 3 mole fraction 4 mass percent |
| Answer» Ans:\xa03. mole fraction 4. mass percenta) Mole Fraction - it is defined as the ratio of number of moles of one component to the total number of moles of solute & solvent present in the solution.Mole fraction = number of moles of the component / total number of moles of all componentsIt is denoted by x.Take it as binary solution, the number of the moles of solute will be\xa0nA\xa0and the number of moles of solvent will be\xa0nB, then the mole fraction of the solute in the solution is given as:\xa0\xa0\xa0In the same manner, the mole fraction of the solvent in the solution is given as:\xa0b) Molality- it is the number of moles of the solute dissolved per 1000g of the solvent.It is denoted by mMolality = mole of solute / mass of solvent in kgUnit for molality are moles/kg\xa0c) Molarity- it is the number of moles of the solute dissolved per litre of the solution.It is represented by M.Molarity = moles of solute / volume of solute in litresUnit for molarity is moles/litre\xa0d) Mass Percentage- the mass percentage of a component in a given solution is the mass of the component per 100g of the solution.Mass percentage of the component = (mass of the component in the solution/total mass of the solution) x100 | |
| 36. |
What is chemistry..... ¿??? |
| Answer» Chemistry is the scientific discipline involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances. | |
| 37. |
What is the structure of an atom? |
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Answer» I think , ki ap zayadatar answers ka reply karte hi. Thanks Gaurav \tAn atom consists of heavy positively charged nucleus. The whole mass of the atom is concentrated in the nucleus.\tThe electrons in an atom revolve around the nucleus in definite circular paths called orbits or energy level.\tEach energy level is associated with definite amount of energy.\t\xa0The change in energy takes place when electron jumps from one energy level to another energy level. |
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| 38. |
Valence bond theory..?? |
| Answer» According to the valence bond theory, Electrons in a molecule occupy atomic orbitals rather than molecular orbitals. The atomic orbitals overlap on the bond formation and the larger the overlap the stronger the bond.The metal bonding is essentially covalent in origin and metallic structure involves resonance of electron-pair bonds between each atom and its neighbors. | |
| 39. |
What is coloid solution....?? |
| Answer» A colloid is a mixture in which one substance of microscopically dispersed insoluble particles are suspended throughout another substance. However, some definitions specify that the particles must be dispersed in a liquid, and others extend the definition to include substances like aerosols and gels. | |
| 40. |
Suggest me some themes about Himachal Pradesh |
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Answer» Art integrated project.... Based on Himachal Pradesh (chemistry related themes) ?? |
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| 41. |
write the name of principal who is not name of any scientist |
| Answer» Aufbau principle , given in our NCERT book ?????? | |
| 42. |
How many orbitals in p, d, f, |
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| 43. |
Calculate the number of moles of CO2 in 1.12 L of CO2 at ntp |
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Answer» 0.05moles A n s w e r:1 mole of any gas at STP occupies 22.4 litres of volume.Therefore number of moles in 1.12 litres = 1.12/22.4 = 0.05 moles of CO2 |
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| 44. |
What is dielectric..?? |
| Answer» A dielectric is a material which has poor electrical conductivity but inherits an ability to store an electrical charge(due to Dielectric polarization). Thus exhibiting only\xa0displacement current\xa0making it ideal to build a capacitor; to store and return electrical energy. | |
| 45. |
Lattice enthalapy...?? |
| Answer» Ionic compounds have a strong molecular force of attraction and they are generally found in solid states. In these ionic solids, the molecules are arranged in a three-dimensional grid-like structure also known as a\xa0lattice structure. The amount of energy required to completely separate one mole of the solid ionic compound into constituent gaseous ions is known as\xa0lattice enthalpy. | |
| 46. |
What is limiting reagent.....?? |
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Answer» Good aap batao...school ja rahe ho? Dosto ke sath bahot mazza aa raha hoga??? Good morning ? bhai The\xa0reactant\xa0which reacts completely in the reaction is called\xa0limiting reactant\xa0or\xa0limiting reagent. Let us consider the following reaction of formation of ammonia:\xa03H2\xa0+ N2\xa0→ 2NH3In the reaction given above, 3 moles of Hydrogen gas are required to react with 1 mole of\xa0nitrogen gas\xa0to form 2 moles of ammonia. But what if, during the reaction, only 2 moles of hydrogen gas are available along with 1 mole of nitrogen.In that case, the entire quantity of nitrogen cannot be used (because the entirety of nitrogen requires 3 moles of hydrogen gas to react). Hence, the hydrogen gas is limiting the reaction and is therefore called the limiting reagent for this reaction. The reactant in a chemical reaction that limits the amount of product that can be formed. The reaction will stop when all of the limiting reactant is consumed. |
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| 47. |
What will be the minimum pressure required to compress 500dm at 30c |
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| 48. |
Batao kya poochna hai .sahil |
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Answer» Hmm..... It\'s your last chance to ask question .And if you are not going to ask me question this time then l will not bound to give you any answer. Ok Aacha theek h mai aa gayi ab bolo.Mai zaya daar ke liye online nahi raha sakti. Aap hi chale jata Ho or seen kar k reply bhi nhi karta Pahalai khud hi shuru karte ho or phir poochne ke time par gayab .wah!! ? |
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| 49. |
What is chemical bond........? |
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Answer» Haa bhai ?? ... Good evening bhai... |
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| 50. |
What is molecular formula....?? |
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